计算题:某锅炉的循环倍率K=5,求此时上升管内介质的干度?
参考答案:
x=1/K=1/5=0.2
此时上升管内介质的干度是0.2
----Did you see a child dressed in red pass by?
----Sorry, I _____ the poster on the board without noticing anyone.
A.have read
B.had read
C.am reading
D.was reading
论述教师的最佳智能结构?